Promax OD-624B User manual

OD-624B
TOUCHSCREEN DIGITAL STORAGE
OSCILLOSCOPE

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Table of Contents
1 SAFETY RULES ........................................................................................1
2 Symbols related with safety:............................................................................2
3 BASIC USER GUIDE..........................................................................................4
Introduction to the Structure of the Oscilloscope ..................................................... 5
Front Panel ................................................................................................................................ 5
Rear Panel ................................................................................................................................. 6
Control Area............................................................................................................................... 7
User Interface Introduction ..........................................................................................8
How to Implement the General Inspection ...............................................................10
How to Implement the Function Inspection..............................................................11
How to Set the Probe Attenuation Coefficient .........................................................13
How to Use the Probe Safely .....................................................................................14
How to Implement Self-calibration ............................................................................15
Introduction to the Vertical System...........................................................................15
Introduction to the Horizontal System ......................................................................16
Introduction to the Trigger System ...........................................................................17
Touchscreen Controls (Touchscreen is optional) ...................................................18
4 Advanced User Guidebook ............................................................................24
How to Set the Vertical System ................................................................................. 25
Use Mathematical Manipulation Function ................................................................27
Waveform math ...................................................................................................................... 29
User defined function............................................................................................................... 29
Digital Filter .............................................................................................................................. 30
Using FFT function................................................................................................................... 31
Use Vertical Position and Scale Knobs ....................................................................37
How to Set the Horizontal System............................................................................. 38
Waveform Horizontal Zooming ................................................................................................ 38
Magnifier (For specific models)................................................................................................ 39
How to Set the Trigger/Decoding System ............................................................................... 41
Single Trigger........................................................................................................................... 42
Logic Trigger ............................................................................................................................ 52
Bus Trigger .............................................................................................................................. 54
Bus Decoding (Optional).......................................................................................................... 60
How to Operate the Function Menu...........................................................................65

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How to Implement Sampling Setup ......................................................................................... 65
How to Set the Display System ............................................................................................... 68
How to Save and Recall a Waveform ...................................................................................... 71
How to Record / Playback Waveforms .................................................................................... 79
How to Clone and Recall a waveform...................................................................................... 82
How to Implement the Auxiliary System Function Setting....................................................... 88
How to Update your Instrument Firmware............................................................................... 93
How to Measure Automatically ................................................................................................ 94
How to Measure with Cursors.................................................................................................. 99
How to Use Autoscale ........................................................................................................... 102
How to Use Built-in Help........................................................................................................104
How to Use Executive Buttons .............................................................................................. 104
How to Print the Screen Image.............................................................................................. 107
Use the Arbitrary Function Generator (Optional to specific models) ..................................... 107
Output Connection....................................................................................................107
To Set Channels ........................................................................................................108
To Set Signals ...........................................................................................................109
To Output Sine Signals..........................................................................................................109
To Output Square Signals ..................................................................................................... 111
To Output Ramp Signals ....................................................................................................... 111
To Output Pulse Signals ........................................................................................................ 111
To Output Arbitrary Signals ................................................................................................... 112
Frequency Response Analysis ................................................................................116
Use the Multimeter (Optional).........................................................................117
Input Terminals .........................................................................................................117
DMM Menu (optional)................................................................................................ 118
DMM Information Window ........................................................................................119
Making Multimeter Measurements ..........................................................................120
Measuring AC or DC Current................................................................................................. 120
Measuring AC or DC Voltage ................................................................................................ 121
Measuring Resistance ........................................................................................................... 121
Testing Diodes ....................................................................................................................... 121
Testing for Continuity............................................................................................................. 121
Measuring Capacitance ......................................................................................................... 122
Multimeter Features .................................................................................................. 122
Data Hold Mode ..................................................................................................................... 122
Making Relative Measurements ............................................................................................ 122
Information Display ................................................................................................................ 122
Auto or Manual Range ........................................................................................................... 123

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Multimeter Recorder .................................................................................................123
7Communication with PC...............................................................................126
Using USB Port .........................................................................................................126
Using LAN Port..........................................................................................................126
Connect directly ..................................................................................................................... 126
Connect through a router....................................................................................................... 129
Using Wi-Fi to Connect with PC (Optional) ............................................................131
Connect with PC as Wi-Fi Access Point ................................................................................ 131
Connect with PC as Wi-Fi Station.......................................................................................... 132
8CommunicationwithAndroidDeviceviaWi-Fi(Optional)......................................134
How to Connect.........................................................................................................134
Connect with APP as Wi-Fi Access Point.............................................................................. 135
Connect with APP as Wi-Fi Station ....................................................................................... 136
User Interface ........................................................................................................................ 138
Gestures Control.................................................................................................................... 142
9 Demonstration...............................................................................................143
Example 1: Measurement a Simple Signal .............................................................143
Example 2: Gain of a Amplifier in a Metering Circuit............................................. 144
Example 3: Capturing a Single Signal.....................................................................145
Example 4: Analyze the Details of a Signal ............................................................147
Example 5: Application of X-Y Function ................................................................. 149
Example 6: Video Signal Trigger .............................................................................151
10 Troubleshooting..........................................................................................152
11 Technical Specifications.............................................................................153
Oscilloscope..............................................................................................................153
Trigger.................................................................................................................................... 155
Waveform Generator (Optional)...............................................................................157
General Technical Specifications............................................................................158
12 Appendix......................................................................................................160
Appendix A: Enclosure.............................................................................................160
Appendix B: General Care and Cleaning ................................................................ 160
Appendix C: Battery Using Guide ...........................................................................161

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1 SAFETY RULES
* The safety can turn compromised if there are not applied the
instructions given in this Manual.
* Use the equipment only on systems or devices to measure the negative
connected to ground potential or off-grid.
* This is a class I equipment, for safety reasons plug it to a supply line with the
corresponding ground terminal.
*This equipment can be used in Over-Voltage Category II installations and
Pollution Degree 1 environments.
* When using some of the following accessories use only the specified ones
to ensure safety:
Power cord
Probes
* Observe all specified ratings both of supply and measurement.
* Remember that voltages higher than 70 V DC or 33 V AC rms are
dangerous.
* Use this instrument under the specified environmental conditions.
* The user is only authorized to carry out the following maintenance
operations:
Replace the mains fuse of the specified type and value.
On the Maintenance paragraph the proper instructions are given.
Any other change on the equipment should be carried out by
qualified personnel.
* The negative of measure is at ground potential.
* Do not obstruct the ventilation system.
* Follow the cleaning instructions described in the Maintenance paragraph.

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2 Symbols related with safety:
The four channels of the oscilloscope are not electrically isolated. The
channels should adopt a common ground during measuring. To prevent
short circuits, the 2 probe grounds must not be connected to 2 different
non-isolated DC levels.
The diagram of the oscilloscope ground wire connection:
Ground Clip
Signal Input
Oscilloscope Electrical OutletProbe
Power Cord
The diagram of the ground wire connection when the battery-powered
oscilloscope is connected to the AC-powered PC through the ports:
Ground Clip
Signal Input
Oscilloscope
(Battery-power) PC Electrical OutletProbe
USB/VGA/COM/
LAN Cable
It is not allowed to measure AC power when the oscilloscope is AC powered,
or when the battery-powered oscilloscope is connected to the AC-powered
PC through the ports.

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Warning:
To avoid fire or electrical shock, when the oscilloscope input
signal connected is more than 42V peak (30Vrms) or on circuits of
more than 4800VA, please take note of below items:
zOnly use accessory insulated voltage probes and test lead.
zCheck the accessories such as probe before use and
replace it if there are any damages.
zRemove probes, test leads and other accessories
immediately after use.
zRemove USB cable which connects oscilloscope and
computer.
zDo not apply input voltages above the rating of the
instrument because the probe tip voltage will directly
transmit to the oscilloscope. Use with caution when the
probe is set as 1:1.
zDo not use exposed metal BNC or banana plug connectors.
zDo not insert metal objects into connectors.

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3 BASIC USER GUIDE
This chapter deals with the following topics mainly:
zIntroduction to the structure of the oscilloscope
zIntroduction to the user interface
zHow to implement the general inspection
zHow to implement the function inspection
zHow to make a probe compensation
zHow to set the probe attenuation coefficient
zHow to use the probe safely
zHow to implement an self-calibration
zIntroduction to the vertical system
zIntroduction to the horizontal system
zIntroduction to the trigger system
zTouchscreen Controls (Touchscreen is optional)

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Introduction to the Structure of the Oscilloscope
This chapter makes a simple description of the operation and function of the front
panel of the oscilloscope, enabling you to be familiar with the use of the
oscilloscope in the shortest time.
Front Panel
The front panel has knobs and function buttons. The 5 buttons in the column on
the right side of the display screen or in the row under the display screen are menu
selection buttons, through which, you can set the different options for the current
menu. The other buttons are function buttons, through which, you can enter
different function menus or obtain a specific function application directly.
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5 4
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Figure 0-1 Front panel
1. Display area
2. Select the right menu item
3. Control (button and knob) area
4. Probe Compensation: Measurement signal (3.3V/1kHz) output.
5. Input connectors of four channels

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6. Remove the left and right menu
7. Select the bottom menu item
8. Copy button: You can save the waveform by just pressing this button in any
user interface.
9. USB Host port: It is used to transfer data when external USB equipment
connects to the oscilloscope regarded as "host device". For example: Saving
the waveform to USB flash disk needs to use this port.
10. Power on/off.
Rear Panel
Figure 0-2 Rear Panel
1. Handle
2. Air vents
3. Input terminals of multimeter (optional)
4. AC power input jack
5. Fuse
6. Foot stool: Adjust the tilt angle of the oscilloscope.
7. VGA port: To connect the oscilloscope with a monitor or a projector as VGA
output (optional).
8. LAN port: the network port which can be used to connect with PC.
9. USB Device port: It is used to transfer data when external USB equipment
connects to the oscilloscope regarded as "slave device". For example: to use
this port when connect PC to the oscilloscope by USB.
3
10 98 7
12
11
2
6
4
5
1

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10.Lock Hole: You can lock the oscilloscope to a fixed location using the security
lock (please buy it yourself) to secure the oscilloscope.
11.Trig Out(P/F) port: Trigger signal output or Pass/Fail output, also can be used
as the port of CH2 Output of optional dual-channel waveform generator. The
output type can be set on the menu (Utility menu→Output→Output).
12.Out 1 port: Output (single-channel) or CH1 Output (dual-channel) of optional
waveform generator.
Control Area
Figure 0-3 Control Area Overview
1. Function button area: Total 11 buttons
2. Waveform generator controls (optional)
or
DAQ: Multimeter Recorder (see "Multimeter Recorder")
P/F: Pass/Fail (see "Pass/Fail")
W.REC: Waveform Record (see "How to Record / Playback Waveforms")
3. Trigger control area with 2 buttons and 1 knob.
The Trigger Level knob is to adjust trigger voltage. Other 2 buttons refer to
trigger system setting.
4. Horizontal control area with 1 button and 2 knobs.
"HOR" button refer to horizontal system setting menu, "Horizontal Position"
knob control trigger position, "Horizontal Scale" control time base.
1
2
3
8
7
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6

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5. Vertical control area with 5 buttons and 2 knobs.
CH1 - CH4 buttons correspond to setting menu in CH1 - CH4. "Math" button
provides access to math waveform functions (+, -, ×, /, FFT, user function,
digital filter). The "Vertical Position" knob control the vertical position of current
channel, and the "Scale" knob control voltage scale of current channel.
6. Default: Call out the factory settings.
Print: Print an image of what appears on the instrument screen.
Decode(optional): Turn on/off Decode function.
DMM (Multimeter, optional) or Snap (Shortcut button for measurement
snapshot)
7. Direction key: Move the cursor of the focused parameter.
8. Mknob (Multipurpose knob): when a symbol appears on the menu, it
indicates you can turn the M knob to select the menu or set the value. You can
push it to close the menu on the left and right.
User Interface Introduction
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6810 12
17
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25
31
33
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Figure 0-4 Illustrative Drawing of Display Interfaces

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1. Waveform Display Area.
2. Run/Stop (touchable on touchscreen) (see "How to Use Executive
Buttons")
3. The state of trigger, including:
Auto: Automatic mode and acquire waveform without triggering.
Trig: Trigger detected and acquire waveform.
Ready: Pre-triggered data captured and ready for a trigger.
Scan: Capture and display the waveform continuously.
Stop: Data acquisition stopped.
4. Click to auto set (only for touchscreen).
5. The two blue dotted lines indicates the vertical position of cursor
measurement.
6. The pointer indicates the trigger position in the record length.
7. The T pointer indicates the horizontal position for the trigger.
8. It shows present triggering value and displays the site of present window in
internal memory.
9. Touchable icon is to enable ( ) or disable ( ) the touchscreen
controls (only for touchscreen).
10. It shows setting time (see "Config").
11. Wi-Fi is activated.
12. It indicates that there is a USB disk connecting with the oscilloscope.
13. Indicating battery power status (see "Display").
14. Multimeter window.
15. The waveform of CH1.
16. The pointer shows the trigger level position of the source in trigger menu.
17. The two blue dotted lines indicate the horizontal position of cursor
measurement.
18. The waveform of CH2.
19. The waveform of CH3.
20. The waveform of CH4.
21. The frequency of the trigger signal.
22. The icon shows the selected trigger type, e.g. represents triggering on
the rising edge for an Edge trigger. The reading shows the trigger level
value of the corresponding channel.
23. Click to show/hide the touchable shortcut menu (only for touchscreen).

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24. It indicates the measured type and value of the corresponding channel. "T"
means period, "F" means frequency, "V" means the average value, "Vp"
the peak-peak value, "Vr" the root-mean-square value, "Ma" the maximum
amplitude value, "Mi" the minimum amplitude value, "Vt" the Voltage value
of the waveform's flat top value, "Vb" the Voltage value of the waveform's
flat base, "Va" the amplitude value, "Os" the overshoot value, "Ps" the
Preshoot value, "RT" the rise time value, "FT" the fall time value, "PW" the
+width value, "NW" the -Width value, "+D" the +Duty value, "-D" the -Duty
value, "PD" the Delay A->B value, "ND" the Delay A->B value, "TR"
the Cycle RMS, "CR" the Cursor RMS, "WP" the Screen Duty, "RP" the
Phase A->B , "FP" the Phase A->B , "+PC" the +Pulse count, "-PC" the
- Pulse count, "+E" the Rise edge count, "-E" the Fall edge count, "AR" the
Area, "CA" the Cycle area.
25. The readings show the record length.
26. The readings show current sample rate.
27. The readings indicate the corresponding Voltage Division of the channels.
"BW" indicates bandwidth limit.
The icon shows the coupling mode of the channel.
"—" indicates direct current coupling
"～" indicates AC coupling
"" indicates GND coupling
28. The reading shows the setting of main time base.
29. The green pointer indicates the grounding datum point (zero point position)
of the waveform of the CH1 channel.
30. The orange pointer indicates the grounding datum point (zero point
position) of the waveform of the CH1 channel.
31. It is cursor measure window, showing the absolute values and the
readings of the cursors.
32. The blue pointer indicates the grounding datum point (zero point position)
of the waveform of the CH1 channel.
33. The yellow pointer indicates the grounding datum point (zero point position)
of the waveform of the CH1 channel.
How to Implement the General Inspection
After you get a new oscilloscope, it is recommended that you should make a
check on the instrument according to the following steps:

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1. Check whether there is any damage caused by transportation.
If it is found that the packaging carton or the foamed plastic protection cushion
has suffered serious damage, do not throw it away first till the complete device
and its accessories succeed in the electrical and mechanical property tests.
2. Check the Accessories
The supplied accessories have been already described in the "Appendix A:
Enclosure" of this Manual. You can check whether there is any loss of
accessories with reference to this description. If it is found that there is any
accessory lost or damaged, please get in touch with our distributor responsible
for this service or our local offices.
3. Check the Complete Instrument
If it is found that there is damage to the appearance of the instrument, or the
instrument can not work normally, or fails in the performance test, please get in
touch with our distributor responsible for this business or our local offices. If
there is damage to the instrument caused by the transportation, please keep
the package. With the transportation department or our distributor responsible
for this business informed about it, a repairing or replacement of the instrument
will be arranged by us.
How to Implement the Function Inspection
Make a fast function check to verify the normal operation of the instrument,
according to the following steps:
1. Connect the power cord to a power source. Long press the button
on the bottom left of the instrument.
The instrument carries out all self-check items and shows the Boot Logo. Push
the Utility button, select Function in the bottom menu. Select Adjust in the
left menu, select Default in the bottom menu. The default attenuation
coefficient set value of the probe on the menu is 10X.
2. Set the Switch in the Oscilloscope Probe as 10X and Connect the
Oscilloscope with CH1 Channel.
Align the slot in the probe with the plug in the CH1 connector BNC, and then
tighten the probe with rotating it to the right side.
Connect the probe tip and the ground clamp to the connector of the probe
compensator.

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3. Push the Autoset Button on the front panel.
The square wave of 1 KHz frequency and 3.3V peak-peak value will be
displayed in several seconds (see Figure 0-5).
Figure 0-5 Auto set
Check CH2, CH3 and CH4 by repeating Step 2 and Step 3.
How to Implement the Probe Compensation
When connect the probe with any input channel for the first time, make this
adjustment to match the probe with the input channel. The probe which is not
compensated or presents a compensation deviation will result in the
measuring error or mistake. For adjusting the probe compensation, please
carry out the following steps:
1. Set the attenuation coefficient of the probe on the menu as 10X and that of
the switch in the probe as 10X (see "How to Set the Probe Attenuation
Coefficient"), and connect the probe with the CH1 channel. If a probe hook
tip is used, ensure that it keeps in close touch with the probe. Connect the
probe tip with the signal connector of the probe compensator and connect
the reference wire clamp with the ground wire connector of the probe
connector, and then push the Autoset button on the front panel.
2. Check the displayed waveforms and regulate the probe till a correct
compensation is achieved (see Figure 0-6 and Figure 0-7).
Overcompensated Compensated correctly Under compensated
Figure 0-6 Displayed Waveforms of the Probe Compensation

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3. Repeat the steps mentioned if needed.
Figure 0-7 Adjust Probe
How to Set the Probe Attenuation Coefficient
The probe has several attenuation coefficients, which will influence the vertical
scale factor of the oscilloscope.
To change or check the probe attenuation coefficient on the menu of
oscilloscope:
Push the function menu button of the used channels (CH1 - CH4 button).
(1) Select Probe in the bottom menu; select Attenu in the right menu, turn the
Mknob to select the proper value corresponding to the probe.
This setting will be valid all the time before it is changed again.
Caution:
The default attenuation coefficient of the probe on the instrument is
preset to 10X.
Make sure that the set value of the attenuation switch in the probe is
the same as the menu selection of the probe attenuation coefficient in
the oscilloscope.
The set values of the probe switch are 1X and 10X (see Figure 0-8).
Figure 0-8 Attenuation Switch

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Caution:
When the attenuation switch is set to 1X, the probe will limit the
bandwidth of the oscilloscope in 5MHz. To use the full bandwidth of
the oscilloscope, the switch must be set to 10X.
Identify the Probe Attenuation Coefficient Automatically
The oscilloscope can identify the probe attenuation coefficient of the 100:1
(impedance 5 K ± 20%) or 10:1 (impedance 10 K ± 20%) probe with the
identifying pin. When you attach the probe, the oscilloscope set the attenuation
automatically on the oscilloscope vertical menu for the channel to match the
probe.
For example, if you attach a 10:1 probe with the identifying pin, the screen will
prompt "The probe attenuation factor is X10", and set the attenuation to 10X
automatically on the oscilloscope vertical menu for the channel.
How to Use the Probe Safely
The safety guard ring around the probe body protects your finger against any
electric shock, shown as Figure 0-9.
Figure 0-9 Finger Guard
Warning:
To avoid electric shock, always keep your finger behind the safety
guard ring of the probe during the operation.
To protect you from suffering from the electric shock, do not touch any
metal part of the probe tip when it is connected to the power supply.
Before making any measurements, always connect the probe to the
instrument and connect the ground terminal to the earth.

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How to Implement Self-calibration
The self-calibration application can make the oscilloscope reach the optimum
condition rapidly to obtain the most accurate measurement value. You can
carry out this application program at any time. This program must be executed
whenever the change of ambient temperature is 5ºC or over.
Before performing a self-calibration, disconnect all probes or wires from the
input connector. Push the Utility button, select Function in the bottom menu,
select Adjust. in the left menu, select Self Cal in the bottom menu; run the
program after everything is ready.
Introduction to the Vertical System
As shown in Figure 0-10, there are a few of buttons and knobs in Vertical
Controls.
The 4 channels are marked by different colors which are also used to mark
both the corresponding waveforms on the screen and the channel input
connectors. Press one of the channel buttons to open the corresponding
channel menu, and press again to turn off the channel.
Press the Math button to display the math menu in the bottom. The pink M
waveform appears on the screen. Press again to turn off the math waveform.
The 4 channels use the same Vertical Position and Vertical Scale knobs. If
you want to set the vertical scale and vertical position of a channel, please
press CH1, CH2, CH3 or CH4 at first to select the desired channel. Then turn
the Vertical Position and Vertical Scale knobs to set the values.
Figure 0-10 Vertical Control Zone
The following practices will gradually direct you to be familiar with the using of the
vertical setting.

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1. Press CH1, CH2, CH3 or CH4 to select the desired channel.
2. Use the Vertical Position knob to show the selected channel waveform in the
center of the waveform window. The Vertical Position knob functions the
regulating of the vertical display position of the selected channel waveform.
Thus, when the Vertical Position knob is rotated, the pointer of the earth
datum point of the selected channel is directed to move up and down following
the waveform, and the position message at the center of the screen would
change accordingly.
3. Measuring Skill
If the channel is under the DC coupling mode, you can rapidly measure the DC
component of the signal through the observation of the difference between the
wave form and the signal ground.
If the channel is under the AC mode, the DC component would be filtered out.
This mode helps you display the AC component of the signal with a higher
sensitivity.
Vertical offset back to 0 shortcut key
Turn the Vertical Position knob to change the vertical display position of the
selected channel, and push the position knob to set the vertical display
position back to 0 as a shortcut key, this is especially helpful when the trace
position is far out of the screen and want it to get back to the screen center
immediately.
4. Change the Vertical Setting and Observe the Consequent State Information
Change.
With the information displayed in the status bar at the bottom of the waveform
window, you can determine any changes in the channel vertical scale factor.
Turn the Vertical Scale knob and change the "Vertical Scale Factor (Voltage
Division)" of the selected channel, it can be found that the scale factor of the
selected channel in the status bar has been changed accordingly.
Introduction to the Horizontal System
Shown as Figure 0-11, there are a button and two knobs in the Horizontal
Controls. The following practices will gradually direct you to be familiar with
the setting of horizontal time base.